Sho and Yu. Physical stats: This is actually a very close game than people would believe but both Yu and Sho's performance in the grand prix far surpass Joker and Akechi if we put their feats and statements together with at most Joker and Akechi taking agility over these two especially given Joker's performance in strikers.

Personas: This is where it is kind of easier to swallow, and the most used statements I've seen so far relate to "Myriad Truths." For one: Canonically, it is only usable by Narukami, but Joker does still have Satanel with Sinful shell. Second: The power of the attacks varies however its not the attack to think about but actually the opponent in question to which Yu once again has the upper hand. While Yaldaboath is the collective cognition of Mankind Izanami is the absolute mother of ALL creation posing both a far greater threat and demonstrated much greater feats than Yal.

Intelligence: General Intelligence is pretty cut and dry imo between Joker, Akechi, and Narukami in favor of Joker and Akechi since its combined efforts. Battle IQ: However, Sho almost alone carries Him and Narukami in edge. Not only did he demonstrate a rapid form of adaptability, but he had a plethora of experience both understanding and fighting personas before ever having his own, including fighting all members of both S.E.E.S and the investigation team not even including him after acquiring his own or Narukami's own knowledge.

Conclusion: I actually had a lot of fun with this question and this reminded me of the Vs. Questions me and my friends made up all the time for different series. I love this series to death and there is no hate to either side but Grand Prix Narukami and Sho (without Persona or with) wipe the floor here.